"Eccentric genius Walter O Brien (Elyes Gabel) and his team of brilliant misfits, who are Homeland Security's new think tank, return to battle more complex high-tech threats in Scorpion's thrilling third season. Cast led by Elyes Gabel (Interstellar, Game of Thrones ), Katharine McPhee ( Smash ), Robert Patrick (Terminator 2: Judgment Day), Eddie Kaye Thomas (American Pie), Jadyn Wong ( Being Erica ), and Ari Stidham ( Huge ). Season 3 includes 24 episodes. Renewed for season 4. Guest Stars: Michael McGrady (Ray Donovan), Penn Jillette (Penn & Teller) and Lea Thompson (Back to the Future)."